Merge branch 'lt/deepen-builtin-source'

[git.git] / builtin / var.c

diff --git a/builtin/var.c b/builtin/var.c
new file mode 100644 (file)
index 0000000..70fdb4d
--- /dev/null
+++ b/builtin/var.c
@@ -0,0 +1,99 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Eric Biederman, 2005
+ */
+#include "cache.h"
+#include "exec_cmd.h"
+
+static const char var_usage[] = "git var (-l | <variable>)";
+
+static const char *editor(int flag)
+{
+       const char *pgm = git_editor();
+
+       if (!pgm && flag & IDENT_ERROR_ON_NO_NAME)
+               die("Terminal is dumb, but EDITOR unset");
+
+       return pgm;
+}
+
+static const char *pager(int flag)
+{
+       const char *pgm = git_pager(1);
+
+       if (!pgm)
+               pgm = "cat";
+       return pgm;
+}
+
+struct git_var {
+       const char *name;
+       const char *(*read)(int);
+};
+static struct git_var git_vars[] = {
+       { "GIT_COMMITTER_IDENT", git_committer_info },
+       { "GIT_AUTHOR_IDENT",   git_author_info },
+       { "GIT_EDITOR", editor },
+       { "GIT_PAGER", pager },
+       { "", NULL },
+};
+
+static void list_vars(void)
+{
+       struct git_var *ptr;
+       const char *val;
+
+       for (ptr = git_vars; ptr->read; ptr++)
+               if ((val = ptr->read(0)))
+                       printf("%s=%s\n", ptr->name, val);
+}
+
+static const char *read_var(const char *var)
+{
+       struct git_var *ptr;
+       const char *val;
+       val = NULL;
+       for (ptr = git_vars; ptr->read; ptr++) {
+               if (strcmp(var, ptr->name) == 0) {
+                       val = ptr->read(IDENT_ERROR_ON_NO_NAME);
+                       break;
+               }
+       }
+       return val;
+}
+
+static int show_config(const char *var, const char *value, void *cb)
+{
+       if (value)
+               printf("%s=%s\n", var, value);
+       else
+               printf("%s\n", var);
+       return git_default_config(var, value, cb);
+}
+
+int cmd_var(int argc, const char **argv, const char *prefix)
+{
+       const char *val;
+       int nongit;
+       if (argc != 2) {
+               usage(var_usage);
+       }
+
+       setup_git_directory_gently(&nongit);
+       val = NULL;
+
+       if (strcmp(argv[1], "-l") == 0) {
+               git_config(show_config, NULL);
+               list_vars();
+               return 0;
+       }
+       git_config(git_default_config, NULL);
+       val = read_var(argv[1]);
+       if (!val)
+               usage(var_usage);
+
+       printf("%s\n", val);
+
+       return 0;
+}